Sony Sports MDR-A17G Stereo Headphones Made in Japan Earphones in Ear Yellow MADE IN JAPAN Stereo Headphones Water resistant twin turbo New design for perfect fit in the ears folding design for mega bass avoid listening with your headphones at so loud a volume that extended play might affect your hearing. Driver units: 13.5mm dia 16 ohms at 1 khz sensitivity 104 dB/mW, Frequency responce: 12-22,000 Hz weight Approx 18g (0.63 oz/without cord)